服务端等待客户端连接并接收客户端信息，然后将客户端信息加上时间戳返回给客户端, 当客户端输入空消息时，连接中断，服务端继续坚挺其他连接。

服务端代码：

from socket import *
from time import ctime

HOST = ''   #监听所有地址
PORT = 21560
BUFSIZ = 1024
ADDR = (HOST, PORT)

tcpSerSock = socket(family=AF_INET, type=SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)

while True:
    print('waiting...')
    tcpCliSock, addr = tcpSerSock.accept()
    print '...connect from:', addr

    while True:
        data = tcpCliSock.recv(BUFSIZ)
        if not data:
            break
        print data
        tcpCliSock.send('[%s] %s' % (ctime(), data))
    tcpCliSock.close()
tcpSerSock.close()

客户端代码：

from socket import *
HOST = 'localhost'
PORT = 21560
BUFSIZ = 1024
ADDR = (HOST, PORT)

tcpCliSock = socket(AF_INET, SOCK_STREAM)
tcpCliSock.connect(ADDR)

while True:
    data = raw_input('> ')
    print type(data)
    if not data:
        break
    tcpCliSock.send(data)
    data = tcpCliSock.recv(BUFSIZ)
    if not data:
        break
    print data
tcpCliSock.close()